Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors

Mondy, L.; Mrozek, R.; Rao, R.; Lenhart, J.; Bieg, L.; Spangler, S.; Stavig, M.; Schroeder, J.; Winter, M.; Diantonio, C.; Collins, R.

doi:10.3139/217.2872

Title: Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors

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Abstract

Multilayer coextrusion is applied to produce a tape containing layers of alternating electrical properties to demonstrate the potential for using coextrusion to manufacture capacitors. To obtain the desired properties, we develop two filled polymer systems, one for conductive layers and one for dielectric layers. We describe numerical models used to help determine the material and processing parameters that impact processing and layer stability. These models help quantify the critical ratios of densities and viscosities of the two layers to maintain stable layers, as well as the effect of increasing the flow rate of one of the two materials. The conducting polymer is based on polystyrene filled with a blend of low-melting-point eutectic metal and nickel particulate filler, as described by Mrozek et al. (2010). The appropriate concentrations of fillers are determined by balancing measured conductivity with processability in a twin screw extruder. Based on results of the numerical models and estimates of the viscosity of emulsions and suspensions, a dielectric layer composed of polystyrene filled with barium titanate is formulated. Despite the fact that the density of the dielectric filler is less than the metallic filler of the conductive phase, as well as rheological measurements that later showed that themore »« less

Authors:

Mondy, L. ^[1]; Mrozek, R. ^[2]; Rao, R. ^[1]; Lenhart, J. ^[2]; Bieg, L. ^[1]; Spangler, S. ^[1]; Stavig, M. ^[1]; Schroeder, J. ^[1]; Winter, M. ^[1]; Diantonio, C. ^[1]; Collins, R. ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
U.S. Army Research Lab., Aberdeen, MD (United States)

Publication Date:: Fri May 29 00:00:00 EDT 2015

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1110496

Report Number(s):: SAND-2013-7671J
Journal ID: ISSN 0930-777X; 473907

Grant/Contract Number:: AC04-94AL85000

Resource Type:: Accepted Manuscript

Journal Name:: International Polymer Processing

Additional Journal Information:: Journal Volume: 30; Journal Issue: 2; Journal ID: ISSN 0930-777X

Publisher:: Hanser

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Mondy, L., Mrozek, R., Rao, R., Lenhart, J., Bieg, L., Spangler, S., Stavig, M., Schroeder, J., Winter, M., Diantonio, C., and Collins, R. Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors.  United States: N. p., 2015. 
Web.  doi:10.3139/217.2872.

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                    Mondy, L., Mrozek, R., Rao, R., Lenhart, J., Bieg, L., Spangler, S., Stavig, M., Schroeder, J., Winter, M., Diantonio, C., & Collins, R. Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors.  United States.  https://doi.org/10.3139/217.2872

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                    Mondy, L., Mrozek, R., Rao, R., Lenhart, J., Bieg, L., Spangler, S., Stavig, M., Schroeder, J., Winter, M., Diantonio, C., and Collins, R. Fri .  
"Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors".  United States.  https://doi.org/10.3139/217.2872.  https://www.osti.gov/servlets/purl/1110496.

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@article{osti_1110496,

  title        = {Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors},

  author       = {Mondy, L. and Mrozek, R. and Rao, R. and Lenhart, J. and Bieg, L. and Spangler, S. and Stavig, M. and Schroeder, J. and Winter, M. and Diantonio, C. and Collins, R.},

  abstractNote = {Multilayer coextrusion is applied to produce a tape containing layers of alternating electrical properties to demonstrate the potential for using coextrusion to manufacture capacitors. To obtain the desired properties, we develop two filled polymer systems, one for conductive layers and one for dielectric layers. We describe numerical models used to help determine the material and processing parameters that impact processing and layer stability. These models help quantify the critical ratios of densities and viscosities of the two layers to maintain stable layers, as well as the effect of increasing the flow rate of one of the two materials. The conducting polymer is based on polystyrene filled with a blend of low-melting-point eutectic metal and nickel particulate filler, as described by Mrozek et al. (2010). The appropriate concentrations of fillers are determined by balancing measured conductivity with processability in a twin screw extruder. Based on results of the numerical models and estimates of the viscosity of emulsions and suspensions, a dielectric layer composed of polystyrene filled with barium titanate is formulated. Despite the fact that the density of the dielectric filler is less than the metallic filler of the conductive phase, as well as rheological measurements that later showed that the dielectric formulation is not an ideal match to the viscosity of the conductive material, the two materials can be successfully coextruded if the flow rates of the two materials are not identical. A measurable capacitance of the layered structure is obtained.},

  doi          = {10.3139/217.2872},

  journal      = {International Polymer Processing},

  number       = 2,

  volume       = 30,

  place        = {United States},

  year         = {Fri May 29 00:00:00 EDT 2015},

  month        = {Fri May 29 00:00:00 EDT 2015}

}

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